Well I suppose that's one good thing in the UK - I can't see the average escaped reptile surviving long in our climate in order to bugger up the ecology! We don't tend to get many sightings of iguanas, or boas in the Yorkshire countryside... LOL.
Although they never figured out what the Loch Ness Monster is - burmese python maybe???
"If you think you can't afford it, you just don't want it badly enough..."